Horizontal Drains

Horizontal Drains

Often water pressure buildup in slopes due to infiltration and rainfall are main causes of slope failures. Without adequate drainage and vegetation, the slopes may fail. The fast release of ground water is crucial for slope stability hence the idea of perforated horizontal drains, installed horizontally with a slight upward tilt into slopes, allowing ground water to seep into it and drain away. This reduces the bulk weight of the slope, preventing potential sliding failure.

Construction of horizontal drains are similar to soil nails, using our small portable drilling frame. However, drains are inclined upwards and our rigs are adjusted to suit the client specified angle. Typical diameters are 75mm to 100mm which we can drill using various methods.